Method for Measuring Acceleration of Hypersonic Target

A hypersonic and acceleration technology, applied in the field of communication, can solve the problem of low acceleration ambiguity, achieve high precision, overcome low precision, and low computational complexity

Active Publication Date: 2018-08-21
XIDIAN UNIV
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Problems solved by technology

This method makes full use of frequency domain phase difference and two-dimensional spectral line search method to solve the problem of acceleration measurement accuracy and low acceleration ambiguity

Method used

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  • Method for Measuring Acceleration of Hypersonic Target
  • Method for Measuring Acceleration of Hypersonic Target
  • Method for Measuring Acceleration of Hypersonic Target

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings.

[0047] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0048] Step 1. Receive echo data.

[0049] The echo data received by the radar array elements is collected and stored in the system memory in the form of a matrix.

[0050] Taking the cycle of the transmitted chirp signal as the time interval, the echo data within one cycle is stored as one row.

[0051] Step 2. Mixing processing.

[0052] Perform frequency mixing processing on the echo data to obtain low frequency data.

[0053] According to the transmitted chirp signal, the mixing function is designed, and the low-frequency data is obtained by down-mixing.

[0054] Step 3. Perform matched filtering on the low-frequency data according to the following formula to obtain the observation data matrix.

[0055] y=H*X

[0056] Among them, y represents the observati...

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Abstract

A hypersonic velocity target acceleration testing method is mainly used for solving the problems that the acceleration testing precision of the A hypersonic velocity target in the prior art is not high and the measurable scale is small. The method includes steps of (1) receiving echo data; (2) mixing treatment; (3) matched filtering; (4) phase difference of frequency domain; (5) structuring a spectrum coordinate matrix; (6) spectrum peak searching method; (7) calculating target acceleration; (8) outputting target acceleration to the system. By applying the frequency domain phase differential method, the acceleration factor in the echo signal phase can be effectively extracted, so that the method is high in accuracy and low in calculation complexity. By applying the spectral line searching method, the contradiction of acceleration fuzzy and maximum measurable acceleration can be effectively solved, thus the method has the advantage of big measurable zone. Through the treatment in the two-dimensional frequency domain, the invention is applicable to low signal-to-noise ratio.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a hypersonic target acceleration measurement method in the technical field of radar signal processing hypersonic target detection. The invention utilizes the frequency domain information of the Doppler radar echo signal to estimate the target acceleration with a signal processing method, and realizes ballistic missile defense and space hypersonic target detection. Background technique [0002] The traditional target radial acceleration estimation method, by calculating the target distance of multiple periodic echoes, constructs a second-order difference equation and then uses the least square method to calculate the acceleration, but because the ranging error is added to the acceleration calculation, resulting in an error in the acceleration estimate value bigger. [0003] Jia Shuyi, Wang Guohong, and Zhang Lei published a paper "Radial Acceleration Estimation of Man...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 赵光辉刘飞涛沈方芳石光明
Owner XIDIAN UNIV
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